文章摘要
水溶液氯化法快速溶解纯铑粉
Rapid Dissolution of Pure Rhodium Powder by Aqueous Chlorination
投稿时间:2017-11-09  
DOI:
中文关键词: 有色金属冶金  铑粉  溶解  盐酸  氯酸钠
英文关键词: non-ferrous metallurgy  rhodium powder  dissolution  hydrochloric acid  sodium chlorate
基金项目:国家重点研发计划(2016YFB0101309)、云南省应用基础研究计划重点项目(2012FA006)。
作者单位E-mail
杨金富 昆明贵研催化剂有限责任公司昆明 650106  
王火印 昆明贵研催化剂有限责任公司昆明 650106  
李权 昆明贵研催化剂有限责任公司昆明 650106  
卢峰 昆明贵研催化剂有限责任公司昆明 650106  
毕向光 昆明贵研催化剂有限责任公司昆明 650106 xiangguang.bi@spmcatalyst.com 
赵云昆 昆明贵研催化剂有限责任公司昆明 650106  
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中文摘要:
      采用水溶液氯化法,在盐酸-氯酸钠体系中溶解铑粉,考察了反应温度、酸度、氧化剂用量、时间、液固比等因素对铑溶解率的影响。结果表明,浓盐酸升温至85℃后开始加氯酸钠,酸度为8~9 mol/L,饱和氯酸钠溶液用量为250 mL,液固比为45 mL/g,反应时间2 h,铑粉的一次溶解率达到95%以上。机理探讨认为,充当氧化剂的ClO3-在酸性条件下产生的活性[Cl],将金属态的铑氧化,并与体系中的Cl-配位形成[RhCl3]3-
英文摘要:
      Aqueous chlorination technique was used to dissolve pure rhodium powder in hydrochloric acid-sodium chlorate system, and the impacts of various factors on the dissolution rate were investigated. These factors included the reaction temperature and time, acidity, amount of sodium chlorate and liquid-solid ratio. The results indicated that, after it had been chlorinated at 85°C for 2 h, the primary dissolution rate of rhodium powder reached more than 95%, when hydrochloric acid was set at 8~9 mol/L and 250 mL of the saturated sodium chlorate solution was added into the dissolving system and the liquid-solid ratio was 45 mL/g. The dissolution mechanism was also explored. It is believed that Rh is oxidized by active chlorine produced from ClO3- in HCl solution and then coordinated with Cl- to form a stable complex [RhCl6]3-. The formation of [RhCl6]3- facilitates the dissolution of rhodium, in return.
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